add kontor-javalin

kontor-javalin/services/build.gradle

@@ -0,0 +1,7 @@
+plugins {
+    id 'java-library'
+}
+
+dependencies {
+    implementation project(":models")            // <-- add dependency to models subproject
+}

kontor-javalin/services/src/main/java/de/thpeetz/kontor/services/api/PersonReader.java

@@ -0,0 +1,9 @@
+package de.thpeetz.kontor.services.api;
+
+import de.thpeetz.kontor.models.Person;
+
+import java.util.List;
+
+public interface PersonReader {
+    List<Person> getAll();
+}

kontor-javalin/services/src/main/java/de/thpeetz/kontor/services/inmemory/InMemoryPersonReader.java

@@ -0,0 +1,15 @@
+package de.thpeetz.kontor.services.inmemory;
+
+import de.thpeetz.kontor.models.Person;
+import java.util.List;
+
+import de.thpeetz.kontor.services.api.PersonReader;
+
+public class InMemoryPersonReader implements PersonReader {
+    @Override
+    public List<Person> getAll() {
+        return List.of(
+                new Person("Vincent Vega", 73),
+                new Person("Jules Winnfield", 12));
+    }
+}

kontor-javalin/services/src/main/java/module-info.java

@@ -0,0 +1,11 @@
+import de.thpeetz.kontor.services.api.PersonReader;
+import de.thpeetz.kontor.services.inmemory.InMemoryPersonReader;
+
+module de.thpeetz.kontor.services {
+    exports de.thpeetz.kontor.services.api;
+
+    requires de.thpeetz.kontor.models;
+
+    // We're telling the ServiceLoader that the InMemoryPersonReader provides the implementation for the PersonReader interface
+    provides PersonReader with InMemoryPersonReader;
+}